marketplace_discover_tools

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'Discover' and mentions filters, but does not state whether the operation is read-only, what the return format is, how pagination works, or any other behavioral details.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is just two short sentences, with the main action and resource front-loaded. Every word is functional and there is no redundant information.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool has 9 optional parameters, no output schema, and no annotations, the description is too sparse. It lacks information about the return format, page size, how results are ordered, typical use cases, or distinctions from many marketplace_* siblings, making it insufficient for accurate invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage, so the baseline is 3. The description mentions price, category, and rating filters, which map to maxPrice, category, and minRating, but adds little beyond what the schema already documents. 'and more' is vague and does not enrich parameter meaning.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Discover' and names the resource ('paid AI tools in the marketplace'), and it lists filtering dimensions (price, category, rating) that make the tool's function clear. However, it does not explicitly differentiate from similarly named sibling tools such as marketplace_search or marketplace_trending.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives no guidance on when to use this tool versus alternatives. It only states that filtering is possible, without explaining when discovery is preferred over searching, trending, or recommendations, and it does not mention any exclusions or prerequisites.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.